Tham khảo tài liệu 'giáo trình sql bài 19', công nghệ thông tin, cơ sở dữ liệu phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lecture 9 Query Processing and Optimization 0 UNIVERSITY Objectives Introduction to Query Processing Translating SQL Queries into Relational Algebra Algorithms for External Sorting Algorithms for SELECT and JOIN Operations Algorithms for PROJECT and SET Operations Implementing Aggregate Operations and Outer Joins Reference Chapter 15 Faculty of Science and Technology Database Fundamentals 2 0 UNIVERSITY Introduction to Query Processing Query optimization The process of choosing a suitable execution strategy for processing a query. Two internal representations of a query Query Tree Query Graph Faculty of Science and Technology Database Fundamentals
